The U.S. is in a heightened state of alert because suspected terrorists have gone missing. Meanwhile, Bartlet struggles with the message that he wants to convey to his youngest daughter Zoey's (recurring guest star ELISABETH MOSS), graduating class at Georgetown University. C.J. must stop reporter Danny Concanon (Timothy Busfield) from filing a story. And Charlie decides whether or not to keep a romantic promise he made to Zoey when they were dating. Recurring guest star TAYE DIGGS ("Chicago," "How Stella Got Her Groove Back") appears as the new head of Zoey's Secret Service detail.